package com.house.base;

import com.sun.org.apache.regexp.internal.RE;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.web.ErrorAttributes;
import org.springframework.boot.autoconfigure.web.ErrorController;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

/**
 *全局统一异常处理
 * @author:lzq
 * @date: 2018/5/24 22:14
 */
@Controller
public class AppErrorController implements ErrorController{

    private static final String ERROR_PATH="/error";

    private ErrorAttributes errorAttributes;

    @Override
    public String getErrorPath() {
        return ERROR_PATH;
    }

    @Autowired
    public AppErrorController(ErrorAttributes errorAttributes) {
        this.errorAttributes = errorAttributes;
    }

    /**
     * web错误页面处理
     */
    @GetMapping(value = ERROR_PATH,produces = "text/html")
    @ResponseBody
    public String errorPageHandler(HttpServletRequest request, HttpServletResponse response){

        int status=response.getStatus();
        switch (status){
            case 403:
                return "403";
            case 404:
                return "404";
            case 500:
                return "500";
        }
        return "index";
    }

    /**
     * 非web页面错误处理 比如Json/XML等
     */
    @RequestMapping(value = ERROR_PATH)
    @ResponseBody
    public ApiResponse erorApiHandler(HttpServletRequest request){

        RequestAttributes requestAttributes = new ServletRequestAttributes(request);

        Map<String,Object> attr=this.errorAttributes.getErrorAttributes(requestAttributes,false);

        int status=getStatus(request);

        return ApiResponse.ofMessage(status, String.valueOf(attr.getOrDefault("message","error")));

    }

    private int getStatus(HttpServletRequest request){

        Integer status= (Integer) request.getAttribute("javax.servlet.error.status_code");

        if(status!=null){
            return status;
        }

        return 500;

    }
}
